Filter monitoring system

Details Filter monitoring system Filter monitoring system

1982-06-17

1985-02-19

Gill, James J.

Communications: electrical

Condition responsive indicating system

Specific condition

116DIG42, G08B 2100

Patent

active

045008744

ABSTRACT:
A fluid filter monitoring system includes a filter relief valve movable in response to a pressure buildup caused by filter clogging to sequentially actuate a pair of pressure-operated switches. A temperature sensor senses the temperature of fluid in the hydraulic system. A control unit, including a microprocessor, controls the energization of a plurality of indicators, depending upon the status of the temperature sensor, the pressure-operated switches and the duration of actuation of the switches.

REFERENCES:
patent: 3323648 (1967-06-01), Rosaen
patent: 3944969 (1976-03-01), Arai et al.
patent: 3970104 (1976-07-01), Decker et al.
patent: 4184146 (1980-01-01), Fratzke et al.
patent: 4216524 (1980-08-01), Leveraus

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